#include <G4BraggModel.hh>

Inheritance diagram for G4BraggModel:

Public Member Functions
	G4BraggModel (const G4ParticleDefinition *p=0, const G4String &nam="Bragg")

virtual	~G4BraggModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)

virtual G4double	ComputeCrossSectionPerElectron (const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kineticEnergy, G4double Z, G4double A, G4double cutEnergy, G4double maxEnergy)

virtual G4double	CrossSectionPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)

virtual G4double	ComputeDEDXPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy)

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin, G4double maxEnergy)

virtual G4double	GetChargeSquareRatio (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual G4double	GetParticleCharge (const G4ParticleDefinition p, const G4Material mat, G4double kineticEnergy)

Public Member Functions inherited from G4VEmModel
	G4VEmModel (const G4String &nam)

virtual	~G4VEmModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)=0

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin=0.0, G4double tmax=DBL_MAX)=0

virtual G4double	ComputeDEDXPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=DBL_MAX)

virtual G4double	CrossSectionPerVolume (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

virtual G4double	ChargeSquareRatio (const G4Track &)

virtual G4double	GetChargeSquareRatio (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual G4double	GetParticleCharge (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual void	StartTracking (G4Track *)

virtual void	CorrectionsAlongStep (const G4MaterialCutsCouple , const G4DynamicParticle , G4double &eloss, G4double &niel, G4double length)

virtual G4double	Value (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy)

virtual G4double	MinPrimaryEnergy (const G4Material , const G4ParticleDefinition )

virtual void	SetupForMaterial (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual void	DefineForRegion (const G4Region *)

void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)

G4double	ComputeDEDX (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=DBL_MAX)

G4double	CrossSection (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4double	ComputeMeanFreePath (const G4ParticleDefinition , G4double kineticEnergy, const G4Material , G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition , const G4Element , G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

G4int	SelectIsotopeNumber (const G4Element *)

const G4Element *	SelectRandomAtom (const G4MaterialCutsCouple , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

const G4Element *	SelectRandomAtom (const G4Material , const G4ParticleDefinition , G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=0)

void	SetCrossSectionTable (G4PhysicsTable *)

G4PhysicsTable *	GetCrossSectionTable ()

G4VEmFluctuationModel *	GetModelOfFluctuations ()

G4VEmAngularDistribution *	GetAngularDistribution ()

void	SetAngularDistribution (G4VEmAngularDistribution *)

G4double	HighEnergyLimit () const

G4double	LowEnergyLimit () const

G4double	HighEnergyActivationLimit () const

G4double	LowEnergyActivationLimit () const

G4double	PolarAngleLimit () const

G4double	SecondaryThreshold () const

G4bool	LPMFlag () const

G4bool	DeexcitationFlag () const

G4bool	ForceBuildTableFlag () const

void	SetHighEnergyLimit (G4double)

void	SetLowEnergyLimit (G4double)

void	SetActivationHighEnergyLimit (G4double)

void	SetActivationLowEnergyLimit (G4double)

G4bool	IsActive (G4double kinEnergy)

void	SetPolarAngleLimit (G4double)

void	SetSecondaryThreshold (G4double)

void	SetLPMFlag (G4bool val)

void	SetDeexcitationFlag (G4bool val)

void	ForceBuildTable (G4bool val)

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

const G4Element *	GetCurrentElement () const

Protected Member Functions
virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kinEnergy)

G4double	GetChargeSquareRatio () const

void	SetChargeSquareRatio (G4double val)

Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss *	GetParticleChangeForLoss ()

G4ParticleChangeForGamma *	GetParticleChangeForGamma ()

virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)

const G4MaterialCutsCouple *	CurrentCouple () const

void	SetCurrentElement (const G4Element *)

Additional Inherited Members
Protected Attributes inherited from G4VEmModel
G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

Detailed Description

Definition at line 71 of file G4BraggModel.hh.

Constructor & Destructor Documentation

◆ G4BraggModel()

G4BraggModel::G4BraggModel	(	const G4ParticleDefinition *	p = `0`,
		const G4String &	nam = `"Bragg"`
	)

Definition at line 79 of file G4BraggModel.cc.

  : G4VEmModel(nam),
    particle(0),
    currentMaterial(0),
    protonMassAMU(1.007276),
    iMolecula(-1),
    iPSTAR(-1),
    isIon(false),
    isInitialised(false)
{
  fParticleChange = 0;
  SetHighEnergyLimit(2.0*MeV);
 
  lowestKinEnergy  = 1.0*keV;
  theZieglerFactor = eV*cm2*1.0e-15;
  theElectron = G4Electron::Electron();
  expStopPower125 = 0.0;
 
  corr = G4LossTableManager::Instance()->EmCorrections();
  if(p) { SetParticle(p); }
  else  { SetParticle(theElectron); }
}

◆ ~G4BraggModel()

G4BraggModel::~G4BraggModel ( )

virtual

Definition at line 104 of file G4BraggModel.cc.

105{}

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4BraggModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	Z,
		G4double	A,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 180 of file G4BraggModel.cc.

{
  G4double cross = Z*ComputeCrossSectionPerElectron
                                         (p,kineticEnergy,cutEnergy,maxEnergy);
  return cross;
}

◆ ComputeCrossSectionPerElectron()

G4double G4BraggModel::ComputeCrossSectionPerElectron	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Definition at line 154 of file G4BraggModel.cc.

{
  G4double cross     = 0.0;
  G4double tmax      = MaxSecondaryEnergy(p, kineticEnergy);
  G4double maxEnergy = std::min(tmax,maxKinEnergy);
  if(cutEnergy < maxEnergy) {
 
    G4double energy  = kineticEnergy + mass;
    G4double energy2 = energy*energy;
    G4double beta2   = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
    cross = 1.0/cutEnergy - 1.0/maxEnergy - beta2*log(maxEnergy/cutEnergy)/tmax;
 
    cross *= twopi_mc2_rcl2*chargeSquare/beta2;
  }
 //   G4cout << "BR: e= " << kineticEnergy << " tmin= " << cutEnergy 
 //          << " tmax= " << tmax << " cross= " << cross << G4endl;
 
  return cross;
}

Referenced by ComputeCrossSectionPerAtom(), and CrossSectionPerVolume().

◆ ComputeDEDXPerVolume()

G4double G4BraggModel::ComputeDEDXPerVolume	(	const G4Material *	material,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 209 of file G4BraggModel.cc.

{
  G4double tmax  = MaxSecondaryEnergy(p, kineticEnergy);
  G4double tkin  = kineticEnergy/massRate;
  G4double dedx  = 0.0;
 
  if(tkin < lowestKinEnergy) {
    dedx = DEDX(material, lowestKinEnergy)*sqrt(tkin/lowestKinEnergy);
  } else {
    dedx = DEDX(material, tkin); 
  }
 
  if (cutEnergy < tmax) {
 
    G4double tau   = kineticEnergy/mass;
    G4double gam   = tau + 1.0;
    G4double bg2   = tau * (tau+2.0);
    G4double beta2 = bg2/(gam*gam);
    G4double x     = cutEnergy/tmax;
 
    dedx += (log(x) + (1.0 - x)*beta2) * twopi_mc2_rcl2
          * (material->GetElectronDensity())/beta2;
  }
 
  // now compute the total ionization loss
 
  if (dedx < 0.0) { dedx = 0.0; }
 
  dedx *= chargeSquare;
 
  //G4cout << "E(MeV)= " << tkin/MeV << " dedx= " << dedx 
  //     << "  " << material->GetName() << G4endl;
 
  return dedx;
}

◆ CrossSectionPerVolume()

G4double G4BraggModel::CrossSectionPerVolume	(	const G4Material *	material,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 194 of file G4BraggModel.cc.

{
  G4double eDensity = material->GetElectronDensity();
  G4double cross = eDensity*ComputeCrossSectionPerElectron
                                         (p,kineticEnergy,cutEnergy,maxEnergy);
  return cross;
}

◆ GetChargeSquareRatio() [1/2]

G4double G4BraggModel::GetChargeSquareRatio ( ) const

inlineprotected

Definition at line 194 of file G4BraggModel.hh.

{
  return chargeSquare;
}

◆ GetChargeSquareRatio() [2/2]

G4double G4BraggModel::GetChargeSquareRatio	(	const G4ParticleDefinition *	p,
		const G4Material *	mat,
		G4double	kineticEnergy
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 132 of file G4BraggModel.cc.

{
  // this method is called only for ions
  G4double q2 = corr->EffectiveChargeSquareRatio(p,mat,kineticEnergy);
  GetModelOfFluctuations()->SetParticleAndCharge(p, q2);
  return q2*corr->EffectiveChargeCorrection(p,mat,kineticEnergy);
}

◆ GetParticleCharge()

G4double G4BraggModel::GetParticleCharge	(	const G4ParticleDefinition *	p,
		const G4Material *	mat,
		G4double	kineticEnergy
	)

virtual

Reimplemented from G4VEmModel.

Reimplemented in G4BraggIonGasModel.

Definition at line 144 of file G4BraggModel.cc.

{
  // this method is called only for ions, so no check if it is an ion 
  return corr->GetParticleCharge(p,mat,kineticEnergy);
}

◆ Initialise()

void G4BraggModel::Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &
	)

virtual

Implements G4VEmModel.

Definition at line 109 of file G4BraggModel.cc.

{
  if(p != particle) { SetParticle(p); }
 
  // always false before the run
  SetDeexcitationFlag(false);
 
  if(!isInitialised) {
    isInitialised = true;
 
    G4String pname = particle->GetParticleName();
    if(particle->GetParticleType() == "nucleus" && 
       pname != "deuteron" && pname != "triton" &&
       pname != "alpha+"   && pname != "helium" &&
       pname != "hydrogen") { isIon = true; }
 
    fParticleChange = GetParticleChangeForLoss();
  }
}

◆ MaxSecondaryEnergy()

G4double G4BraggModel::MaxSecondaryEnergy	(	const G4ParticleDefinition *	pd,
		G4double	kinEnergy
	)

protectedvirtual

Reimplemented from G4VEmModel.

Definition at line 315 of file G4BraggModel.cc.

{
  if(pd != particle) { SetParticle(pd); }
  G4double tau  = kinEnergy/mass;
  G4double tmax = 2.0*electron_mass_c2*tau*(tau + 2.) /
                  (1. + 2.0*(tau + 1.)*ratio + ratio*ratio);
  return tmax;
}

Referenced by ComputeCrossSectionPerElectron(), and ComputeDEDXPerVolume().

◆ SampleSecondaries()

void G4BraggModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	vdp,
		const G4MaterialCutsCouple *	,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 250 of file G4BraggModel.cc.

{
  G4double tmax = MaxSecondaryKinEnergy(dp);
  G4double xmax = std::min(tmax, maxEnergy);
  if(xmin >= xmax) { return; }
 
  G4double kineticEnergy = dp->GetKineticEnergy();
  G4double energy  = kineticEnergy + mass;
  G4double energy2 = energy*energy;
  G4double beta2   = kineticEnergy*(kineticEnergy + 2.0*mass)/energy2;
  G4double grej    = 1.0;
  G4double deltaKinEnergy, f;
 
  G4ThreeVector direction = dp->GetMomentumDirection();
 
  // sampling follows ...
  do {
    G4double q = G4UniformRand();
    deltaKinEnergy = xmin*xmax/(xmin*(1.0 - q) + xmax*q);
 
    f = 1.0 - beta2*deltaKinEnergy/tmax;
 
    if(f > grej) {
        G4cout << "G4BraggModel::SampleSecondary Warning! "
               << "Majorant " << grej << " < "
               << f << " for e= " << deltaKinEnergy
               << G4endl;
    }
 
  } while( grej*G4UniformRand() >= f );
 
  G4double deltaMomentum =
           sqrt(deltaKinEnergy * (deltaKinEnergy + 2.0*electron_mass_c2));
  G4double totMomentum = energy*sqrt(beta2);
  G4double cost = deltaKinEnergy * (energy + electron_mass_c2) /
                                   (deltaMomentum * totMomentum);
  if(cost > 1.0) cost = 1.0;
  G4double sint = sqrt((1.0 - cost)*(1.0 + cost));
 
  G4double phi = twopi * G4UniformRand() ;
 
  G4ThreeVector deltaDirection(sint*cos(phi),sint*sin(phi), cost) ;
  deltaDirection.rotateUz(direction);
 
  // Change kinematics of primary particle
  kineticEnergy       -= deltaKinEnergy;
  G4ThreeVector finalP = direction*totMomentum - deltaDirection*deltaMomentum;
  finalP               = finalP.unit();
  
  fParticleChange->SetProposedKineticEnergy(kineticEnergy);
  fParticleChange->SetProposedMomentumDirection(finalP);
 
  // create G4DynamicParticle object for delta ray
  G4DynamicParticle* delta = new G4DynamicParticle(theElectron,deltaDirection,
                           deltaKinEnergy);
 
  vdp->push_back(delta);
}

◆ SetChargeSquareRatio()

void G4BraggModel::SetChargeSquareRatio ( G4double val )

inlineprotected

Definition at line 199 of file G4BraggModel.hh.

{
  chargeSquare = val;
}

Referenced by G4BraggIonGasModel::ChargeSquareRatio().

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4BraggModel()

◆ ~G4BraggModel()

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ ComputeCrossSectionPerElectron()

◆ ComputeDEDXPerVolume()

◆ CrossSectionPerVolume()

◆ GetChargeSquareRatio() [1/2]

◆ GetChargeSquareRatio() [2/2]

◆ GetParticleCharge()

◆ Initialise()

◆ MaxSecondaryEnergy()

◆ SampleSecondaries()

◆ SetChargeSquareRatio()